Pneumatic dust extraction unit



FIG. 1 is a perspective view of a pneumatic dust extraction unit embodying the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The left side view is a mirror image of the right side view and is therefore not shown. The broken lines showing portions of the pneumatic dust extraction unit form no part of the claimed design. 

CLAIM The ornamental design for a pneumatic dust extraction unit, as shown and described. 